Radian Unit Circle

Convert 210^o to Radians

• 7π / 6

• 21π / 10

• 5π / 6

• 9π / 4

Convert 270^o into radians

• π/ 4

• 3π/ 2

• 3π/ 4

• π/ 2

Convert 35π / 18 radians into degrees

• 350^o

• 340^o

• 355^o

• 345⁰

Convert -41π / 12 radians into degrees

• -600^o

• -605^o

• -610^o

• -615^o

Convert 7π/ 6 radians into degrees

• 225

• 210

• 270

• 240

The length of an arc is 18cm and the radius of the circle is 6cm. What is the radian measure of the central angle?

• 3 radian

• 2 radian

• 4 radian

• 2π radian

A central angle measure 4.5 radians and has an arc of 35 inches. What is the radius of the circle?

• 7.78 inches

• 8.21 inches

• 157.5 inches

• 7 inches

Find the arc length.

• 3π/4 ft

• 39π/4 ft

• 13π/4 ft

• 4π/13 ft

• 12π cm

• 27π cm

• 12 cm

• 27 cm

A circle has radius 12 inches. A central angle intercepts an arc of length 36 inches. What is the radian measure of the central angle?

• 3 radian

• 2 radian

• 6 radian

• 9 radian